LONDON (AP) — Britain and the United States are co-hosting a two-day "asset recovery forum" designed to help find and recover assets believed to have been stolen by the regime of ousted Ukrainian president Viktor Yanukovych.

U.S. Attorney General Eric Holder said Tuesday the effort may take years but should ultimately succeed.

"We are determined," he said of the international bid to track down stolen money, announcing that a "kleptocracy squad" would be set up within the FBI to investigate high-level corruption in Ukraine and other parts of the world.

He said he was satisfied with European Union sanctions against Russia over its actions in Ukraine.

Ukraine's general prosecutor, Oleh Makhnitskyi, said his country has already identified some 1.8 billion pounds ($3 billion) of stolen assets and expects to find billions more.